Don't think you are right. Looks like a simple case of math where he's selling 547,204 shares and will be left with 15K:
Chris Lonsford 562,204 * 319,117 228,087 15,000
Look at Andrew Van Houten for a random example of someone selling all their shares:
Andrew Van Den Houten. 686,273 * 392,156 294,117 *